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Finding the Fourth Proportional to 28,009.13, 42,020.88 and 9,294.41

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Solution

The fourth proportional to 28,009.13, 42,020.88 and 9,294.41 is: 13,944.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.13 : 42,020.88 = 9,294.41 : x
  2. Step 2: Convert to fraction form
    28,009.13/42,020.88 = 9,294.41/x
  3. Step 3: Cross multiply
    28,009.13x = 42,020.88 × 9,294.41
  4. Step 4: Simplify right side
    28,009.13x = 390,559,287.28
  5. Step 5: Solve for x
    x = 390,559,287.28/28,009.13
  6. Step 6: Final answer
    x = 13,944.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.